Package com.levigo.jadice.web.client.tools.dnd

Class DnDImportUtils

java.lang.Object

com.levigo.jadice.web.client.tools.dnd.DnDImportUtils

public class DnDImportUtils
extends Object

Helper class to handle common import actions.

Constructor Summary

Constructors

Constructor	Description
DnDImportUtils()

Method Summary

Modifier and Type	Method	Description
static boolean	datastoreHasType(com.google.gwt.dom.client.NativeEvent event, String type)	Checks if the datastore of the event contains the given type.
static com.google.gwt.dom.client.DataTransfer.DropEffect	getDropEffectByKeys(DnDParameter parameter)	Returns the matching DataTransfer.DropEffect by the keys that are pressed.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DnDImportUtils

public DnDImportUtils()

Method Details

getDropEffectByKeys

public static com.google.gwt.dom.client.DataTransfer.DropEffect getDropEffectByKeys(DnDParameter parameter)

Returns the matching DataTransfer.DropEffect by the keys that are pressed.

• No key = MOVE
• CTRL = COPY
• CTRL + SHIFT = LINK

The keys for the DataTransfer.DropEffect are based on given standards. To get the correct effect while dragging for example between the browser and a java application the same keys have to be used to define the effect. Otherwise the effect would not be reliable as feedback of the accepted action in a cross application drag and drop.

Parameters:

parameter - The parameters used for the import

Returns:

The to the pressed keys matching dropEffect.

datastoreHasType

public static boolean datastoreHasType(com.google.gwt.dom.client.NativeEvent event,
 String type)

Checks if the datastore of the event contains the given type. We cannot check the content of the type but we can check the presence of the type.

Parameters:

event - The event which holds the datastore to check

type - The type to search for

Returns:

True if the datastore contains the type, false otherwise